Display of X-ray topographic images using a channel plate

Abstract

A channel plate has been used in the electro‐magnetic and proximity focusing modes for the instantaneous display of X‐ray topographs using CuKα radiation. The resolution is found to be about 100 m̈m when proximity focusing is used and 50 m̈m, limited by the channel pitch, in the electro‐magnetically focused mode. The device is robust, cheap and easy to construct, and insensitive to ambient lighting.

Characteristics of a channel plate as an image intensifier for X-ray topography

“…Besides, the signal-to-noise ratio is so good that the obtained image may show high contrast. Application of a channel plate to X-ray topography was first carried out by Parpia & Tanner (1971); and, partly because the pore size of the channel plate was of the order of 50/xm, the image resolution was not good enough at that time for X-ray topography. At present, however, as a channel plate with a smaller pore size is commercially available, the resolution is expected to be comparable with at least low-resolution X-ray films.…”

X-ray diffraction

“…Many systems have been described for the display of X-ray topographic images (67, 138,201,203,227,250,274), one having a resolving capability of better than and Lardear (260) have reported on the use of a fluorescent screen with a new industrial X-ray film for which exposures using MoKa radiation are cut by a factor of ten. A special thin fluorescent screen optimized for CuKq radiation was used for Weissenberg and Debye-Scherrer cameras and reduced exposure times by a factor of two.…”